change a cheap laser pointer color? Answered
I got a cheap laser from the shop. here is it : http://www.scitoyscatalog.com/Merchant2/graphics/00000001/small_5_head_laser_pointer.jpg
It is red. Is there a way i can make it green, blue, purple, yellow ,etc. ?
and another one: How can I focus a led on a single spot to be like a laser?